A display panel and a display device

Abstract

The present application discloses a display panel and a display device, relating to the field of display technologies, which can improve the light extraction efficiency of the display panel and thus reduce power consumption. The display panel includes: a substrate layer; a pixel definition layer disposed on one side of the substrate layer, the pixel definition layer being provided with a plurality of first openings, and a light-emitting device being disposed in the first openings; a first refractive index layer disposed on the side of the pixel definition layer away from the substrate layer, the first refractive index layer being provided with a plurality of second openings, and the orthographic projection of the second openings on the substrate layer at least partially covering the orthographic projection of the first openings on the substrate layer; a second refractive index layer is disposed in the second openings, and the refractive index of the second refractive index layer is greater than the refractive index of the first refractive index layer.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] Currently, Organic Light Emitting Diode (OLED) displays are one of the hotspots in the current display research field. With the continuous development of OLED display technology, users have higher and higher requirements for the standby duration of display devices, which puts forward higher requirements for the power consumption of display panels.

[0003] However, the light extraction efficiency of existing display panels is relatively low, and it is difficult to further reduce power consumption. Summary of the Invention

[0004] Embodiments of this application provide a display panel and a display device, which can improve the light extraction efficiency of the display panel and thus reduce power consumption.

[0005] In a first aspect of the embodiments of this application, a display panel is provided, including:

[0006] A substrate layer;

[0007] A pixel definition layer, disposed on one side of the substrate layer, the pixel definition layer being provided with a plurality of first openings, and a light-emitting device being disposed in the first openings;

[0008] A first refractive index layer, disposed on a side of the pixel definition layer away from the substrate layer, the first refractive index layer being provided with a plurality of second openings, and a positive projection of the second openings on the substrate layer at least partially covering a positive projection of the first openings on the substrate layer;

[0009] A second refractive index layer is disposed in the second openings, and the refractive index of the second refractive index layer is greater than the refractive index of the first refractive index layer.

[0010] In some embodiments, an included angle between a sidewall of the second opening and a plane where the substrate layer is located is an acute angle; and / or,

[0011] The refractive index of the first refractive index layer is less than 1.6, and the refractive index range of the second refractive index layer is from 1.6 to 1.9; and / or,

[0012] The thickness range of the first refractive index layer is from 1.5 μm to 3 μm, and the thickness range of the second refractive index layer is from 3 μm to 6 μm.

[0013] In some embodiments, areas of positive projections of the first openings corresponding to the light-emitting devices emitting different color lights on the substrate layer are different.

[0014] In some embodiments, the shape edge of the orthographic projection of the first opening on the substrate layer includes a first arc angle and a second arc angle. The radius of curvature of the first arc angle ranges from 8 μm to 15 μm, and the radius of curvature of the second arc angle ranges from 0 to 3 μm;

[0015] The sector angle range corresponding to the arc length of the first arc angle is from 8° to 15°, and the sector angle range corresponding to the arc length of the second arc angle is from 0° to 3°.

[0016] In some embodiments, the light-emitting device includes a first light-emitting device, a second light-emitting device, and a third light-emitting device, and the colors of the light emitted by the first light-emitting device, the second light-emitting device, and the third light-emitting device are different;

[0017] The area of the orthographic projection of the first opening corresponding to the first light-emitting device on the substrate layer is greater than the area of the orthographic projection of the first opening corresponding to the second light-emitting device on the substrate layer, and the area of the orthographic projection of the first opening corresponding to the first light-emitting device on the substrate layer is greater than the area of the orthographic projection of the first opening corresponding to the third light-emitting device on the substrate layer;

[0018] The orthographic projection of the first opening corresponding to the first light-emitting device on the substrate layer includes the first arc angle and the second arc angle.

[0019] In some embodiments, the second refractive index layer covers the first refractive index layer and the second opening.

[0020] In some embodiments, the edge of the second opening includes a convex portion and / or a concave portion.

[0021] In some embodiments, the edge of the orthographic projection of the second opening corresponding to the straight edge of the orthographic projection of the first opening on the substrate layer includes at least one convex circular arc and / or at least one concave circular arc; and / or,

[0022] When the shape edge of the orthographic projection of the first opening on the substrate layer includes the first arc angle and the second arc angle, the first arc angle corresponds to at least one convex circular arc and / or at least one concave circular arc.

[0023] In some embodiments, the edge of the orthographic projection of the second opening corresponding to the same light-emitting device on the substrate layer includes the convex circular arc or the concave circular arc.

[0024] In some embodiments, the radius range of the convex circular arc is from 0.5 μm to 2 μm; and / or,

[0025] The radius range of the concave arc is from 0.5 μm to 2 μm.

[0026] In some embodiments, the distance between the orthographic projection of the first opening on the substrate layer and the orthographic projection of the second opening on the substrate layer is less than 5 μm;

[0027] The orthographic projection of the first opening on the substrate layer falls within the orthographic projection of the second opening on the substrate layer; or,

[0028] The orthographic projection of the first opening on the substrate layer and the orthographic projection of the second opening on the substrate layer are misaligned and overlapped.

[0029] In some embodiments, the edge of the orthographic projection of the first opening on the substrate layer is parallel to the edge of the orthographic projection of the second opening on the substrate layer.

[0030] In some embodiments, the distance between the edge of the orthographic projection of the first opening on the substrate layer corresponding to the light-emitting device emitting different color light and the edge of the orthographic projection of the second opening on the substrate layer is different.

[0031] In some embodiments, when the shape edge of the orthographic projection of the first opening on the substrate layer includes one first arc angle and three second arc angles, the shape edge of the orthographic projection of the second opening on the substrate layer includes at least two first arc angles;

[0032] The first arc angle corresponding to the first opening is parallel to any one of the first arc angles corresponding to the second opening, and any two of the first arc angles corresponding to the second opening are oppositely arranged.

[0033] In some embodiments, the geometric center of the orthographic projection of the first opening on the substrate layer coincides with the geometric center of the orthographic projection of the second opening on the substrate layer; and / or,

[0034] The first openings are arranged in an array in the row direction and the column direction, and the edge of the orthographic projection of the first opening on the substrate layer is flush with the edge of the orthographic projection of the second opening on the substrate layer in the row direction; and / or,

[0035] The first openings are arranged in an array in the row direction and the column direction, and the edge of the orthographic projection of the first opening on the substrate layer is flush with the edge of the orthographic projection of the second opening on the substrate layer in the column direction; and / or,

[0036] Part of the edge of the orthographic projection of the first opening on the substrate layer is parallel to part of the edge of the orthographic projection of the second opening on the substrate layer.

[0037] In some embodiments, the display panel further includes:

[0038] An encapsulation layer disposed between the pixel defining structure and the first refractive index layer;

[0039] A touch layer, the touch layer is disposed between the encapsulation layer and the first refractive index layer, or the touch layer is disposed on a side of the second refractive index layer away from the substrate layer;

[0040] And / or,

[0041] A light filtering layer, the light filtering layer is disposed between the encapsulation layer and the first refractive index layer, or the light filtering layer is disposed on a side of the second refractive index layer away from the substrate layer.

[0042] In a second aspect of the embodiments of the present application, a display device is provided, including:

[0043] The display panel as described in the first aspect.

[0044] In the display device provided by the embodiments of the present application, by setting the first refractive index layer and the second refractive index layer on the display panel, the first refractive index layer is provided with a plurality of second openings, and the orthographic projection of the second openings on the substrate layer at least partially covers the orthographic projection of the first openings on the substrate layer; a second refractive index layer is disposed in the second openings, and the refractive index of the second refractive index layer is greater than that of the first refractive index layer. The second refractive index layer fills the second openings, the second openings are correspondingly arranged with the first openings, a light emitting device is disposed in the first openings, and the light emitted by the light emitting device first enters the second refractive index layer. Since the refractive index of the second refractive index layer is greater than that of the first refractive index layer, when the light enters the first refractive index layer from the second refractive index layer, the condition of light entering from a medium with a higher refractive index to a medium with a lower refractive index is satisfied. When the incident angle satisfies the total reflection critical angle, total reflection will occur at the interface between the first refractive index layer and the second refractive index layer. Then, the light emitted from the light emitting device at an inclined angle can be gathered and emitted from the display panel. The setting of the first refractive index layer and the second refractive index layer can play a role in condensing light, gathering the light emitted from the light emitting device at an inclined angle and emitting it at a front view angle or approaching the front view angle, which can avoid the absorption or dissipation of the light at an inclined angle, improve the effective light output of the display panel, and improve the display brightness of the display panel. Then, under the driving condition of the same display brightness, the driving power consumption can be reduced, low-power driving can be realized, and the service life can be extended. The light condensing effect of the light emitting device can also play a role in improving the color shift of the display panel, that is, the reflection of the light emitted by each light emitting device can avoid the chromaticity shift caused by the light emitted at an inclined angle exiting directly above other color light emitting devices. Description of the Drawings

[0045] Figure 1 It is a schematic structural diagram of a display panel provided by an embodiment of the present application;

[0046] Figure 2 Schematic structural diagram of another display panel provided by an embodiment of the present application;

[0047] Figure 3 Top view of a partial structure of a display panel provided by an embodiment of the present application;

[0048] Figure 4 Top view of a partial structure of another display panel provided by an embodiment of the present application;

[0049] Figure 5 Schematic cross-sectional view along C-C of a top view of a partial structure of a display panel provided by an embodiment of the present application;

[0050] Figure 6 Top view of a partial structure of yet another display panel provided by an embodiment of the present application;

[0051] Figure 7 Schematic top view of the positional relationship between a light-emitting device and a second opening provided by an embodiment of the present application;

[0052] Figure 8 Schematic cross-sectional view along D-E of a top view of a partial structure of yet another display panel provided by an embodiment of the present application;

[0053] Figure 9 Top view of a partial structure of still another display panel provided by an embodiment of the present application;

[0054] Figure 10 Top view of a partial structure of a display panel provided by an embodiment of the present application;

[0055] Figure 11 Top view of a partial structure of another display panel provided by an embodiment of the present application;

[0056] Figure 12 Top view of a partial structure of yet another display panel provided by an embodiment of the present application;

[0057] Figure 13 Top view of a partial structure of still another display panel provided by an embodiment of the present application;

[0058] Figure 14 Schematic structural diagram of a display device provided by an embodiment of the present application. Detailed implementation manners

[0059] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions in the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions in the embodiments of this specification, rather than limitations on the technical solutions of this specification. Without conflict, the technical features in the embodiments of this specification and the embodiments can be combined with each other.

[0060] In this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. The term "more than two" includes two or more than two.

[0061] Currently, organic light-emitting diode displays are one of the hotspots in the current display research field. With the continuous development of OLED display technology, users have higher and higher requirements for the standby duration of display devices, which puts forward higher requirements for the power consumption of display panels. However, the light extraction efficiency of existing display panels is low, and it is difficult to further reduce power consumption.

[0062] In view of this, the embodiments of this application provide a display panel and a display device, which can improve the light extraction efficiency of the display panel and thus reduce power consumption.

[0063] In the first aspect of the embodiments of this application, a display panel is provided. Figure 1 It is a schematic structural diagram of a display panel provided in the embodiments of this application. As Figure 1As shown in the figure, the display panel provided by the embodiment of the present application includes: a substrate layer 100, a pixel defining layer 200, a light-emitting device 300, a first refractive index layer 400, and a second refractive index layer 500. The substrate layer 100 may be a rigid substrate, such as a glass substrate; the substrate layer 100 may also be a flexible substrate, such as a polyimide substrate. The pixel defining layer 200 is disposed on one side of the substrate layer 100. The pixel defining layer 200 is provided with a plurality of first openings 210, and a light-emitting device 300 is disposed in the first openings 210; the pixel defining layer 200 is used to space apart the light-emitting devices 300, and the light-emitting devices 300 can emit light for screen display. The first refractive index layer 400 is disposed on the side of the pixel defining layer 200 away from the substrate layer 100. The first refractive index layer 400 is provided with a plurality of second openings 410, and the orthographic projection of the second openings 410 on the substrate layer 100 at least partially covers the orthographic projection of the first openings 210 on the substrate layer 100; a second refractive index layer 500 is disposed in the second openings 410, and the refractive index of the second refractive index layer 500 is greater than the refractive index of the first refractive index layer 400. After a part of the light emitted by the light-emitting device 300 irradiates on the interface between the first refractive index layer 400 and the second refractive index layer 500, total reflection and ordinary reflection can occur, as Figure 1 shown by the light propagation path indicated by the solid arrow in the figure. The second refractive index layer 500 is filled in the second openings 410. The second openings 410 are correspondingly disposed with respect to the first openings 210. A light-emitting device 300 is disposed in the first opening. The light emitted by the light-emitting device 300 first enters the second refractive index layer 500. Since the refractive index of the second refractive index layer 500 is greater than the refractive index of the first refractive index layer 400, when the light enters the first refractive index layer 400 from the second refractive index layer 500, the condition of light entering from an optically denser medium to an optically thinner medium is satisfied. When the incident angle satisfies the total reflection critical angle, total reflection will occur at the interface between the first refractive index layer 400 and the second refractive index layer 500. Then, the light emitted from the light-emitting device 300 at an inclined angle can be converged and emitted from the display panel. The light emitted from each light-emitting device 300 at an inclined angle is likely to be emitted directly above other color light-emitting devices, which will cause color mixing of the light emitted by different light-emitting devices 300 and is likely to cause display chromaticity deviation. Therefore, the light-concentrating effect of the light-emitting device 300 can also improve the color deviation of the display panel.

[0064] It should be noted that not all light undergoes total reflection at the interface between the first refractive index layer 400 and the second refractive index layer 500. The setting of different refractive indexes of the two film layers can make the light irradiating on the interface more likely to be reflected, change the propagation direction of the light, and achieve light concentration. The occurrence of total reflection can improve the light-concentrating efficiency.

[0065] It is easy to understand that the setting of the first refractive index layer 400 and the second refractive index layer 500, combined with the setting of the second opening 410, can form a condenser prism to condense the light emitted by the light-emitting device 300, avoid the waste of light rays at an inclined angle, and improve the light extraction efficiency of the display panel.

[0066] It should be noted that Figure 1 The first opening 210 and the second opening 410 shown are both indicated by dashed boxes. Figure 1 The size of the light-emitting device shown is only schematic and is not a specific limitation of this application.

[0067] It should be noted that generally, the light rays emitted at an inclined angle by the light-emitting device will be reflected by other film layers on the side of the light-emitting device away from the substrate layer, and then absorbed, dissipated or reflected to the side of the display panel away from the display side after repeated reflections, making it difficult to be used for image display, resulting in a low effective light extraction amount of the display panel. To meet the requirements of the display image, the driving power consumption will be increased to overcome the shortage of light extraction amount, resulting in a high power consumption of the display panel and easily shortening the service life of the display panel.

[0068] In view of the above problems, the display panel provided by the embodiments of the present application is provided with a first refractive index layer 400 and a second refractive index layer 500. The first refractive index layer 400 is provided with a plurality of second openings 410, and the orthographic projection of the second openings 410 on the substrate layer 100 at least partially covers the orthographic projection of the first opening 210 on the substrate layer 100; the second refractive index layer 500 is disposed within the second openings 410, and the refractive index of the second refractive index layer 500 is greater than the refractive index of the first refractive index layer 400. The second refractive index layer 500 fills the second openings 410, and the second openings 410 are disposed corresponding to the first opening 210. A light-emitting device 300 is disposed within the first opening. The light emitted by the light-emitting device 300 first enters the second refractive index layer 500. Since the refractive index of the second refractive index layer 500 is greater than the refractive index of the first refractive index layer 400, when the light enters the first refractive index layer 400 from the second refractive index layer 500, the condition of light entering from an optically denser medium to an optically thinner medium is satisfied. When the incident angle satisfies the total reflection critical angle, total reflection will occur at the interface between the first refractive index layer 400 and the second refractive index layer 500. Then, the light emitted from the light-emitting device 300 at an inclined angle can be converged and emitted from the display panel. The settings of the first refractive index layer 400 and the second refractive index layer 500 can play a role in condensing light, converging the light emitted from the light-emitting device 300 at an inclined angle to be emitted at a front view angle or an angle approaching the front view angle, which can prevent the light at the inclined angle from being absorbed or dissipated, can increase the effective light output of the display panel, and improve the display brightness of the display panel. Then, under the driving condition of the same display brightness, the driving power consumption can be reduced, low-power driving can be achieved, and thus the service life can be extended. The light condensing effect of the light-emitting device 300 can also play a role in improving the color shift of the display panel, that is, the light condensing effect of the light emitted by each light-emitting device 300 can prevent the chromaticity shift caused by the light emitted at an inclined angle from exiting directly above other color light-emitting devices.

[0069] Exemplarily, the materials of the first refractive index layer 400 and the second refractive index layer 500 may be polyimide or ink, and the embodiments of the present application do not make specific limitations.

[0070] In some embodiments, the refractive index of the first refractive index layer 400 is less than 1.6, for example, it may be 1.54. The refractive index range of the second refractive index layer 500 is from 1.6 to 1.9, for example, it may be 1.7. The adjustment of the refractive index can be achieved by doping zirconium or zirconium oxide in the base material, and the base material may be polyimide or ink, and the embodiments of the present application do not make specific limitations.

[0071] In some embodiments, the thickness range of the first refractive index layer is from 1.5 μm to 3 μm, and the thickness range of the second refractive index layer is from 3 μm to 6 μm.

[0072] In some embodiments, the second refractive index layer 500 covers the first refractive index layer 400 and the second opening 410. The angle between the sidewall of the second opening 410 and the plane of the substrate layer 100 is an acute angle. Exemplarily, Figure 2 is a schematic structural diagram of another display panel provided by an embodiment of the present application. As Figure 2 shown, the second refractive index layer 500 is provided as a whole layer. The second refractive index layer 500 covers the entire first refractive index layer 400 and the second opening 410, which can play a role in planarizing the film layer and can also ensure the effective interface area between the second refractive index layer 500 and the first refractive index layer 400. As Figure 2 shown, the included angle α between the extension plane of the sidewall of the second opening 410 and the plane of the substrate layer 100 is an acute angle. It is easy to understand that one included angle is an acute angle and the other included angle is an obtuse angle, which can ensure that the sidewall of the second opening is an inclined plane, can increase the area of the reflection surface where total reflection occurs, gather more light, and converge more light.

[0073] In some embodiments, the areas of the orthographic projections of the first openings 210 corresponding to the light-emitting devices 300 that emit light of different colors on the substrate layer 100 are different. Specifically, the light-emitting areas of different light-emitting devices 300 can be determined according to the chromaticity scheme of the display panel, the chromaticity characteristics of the light-emitting devices, etc., and the embodiments of the present application do not make specific limitations.

[0074] In some embodiments, the shape edges of the orthographic projection of the first opening 210 on the substrate layer 100 include a first arc angle and a second arc angle. The curvature radius range of the first arc angle is 8 μm to 15 μm, and the curvature radius range of the second arc angle is 0 to 3 μm; the arc angle is the connecting corner of two edges. The corner can be made into an arc, which can be the first arc angle and the second arc angle, and the curvature of the first arc angle is greater than that of the second arc angle. If the curvature radius of the second arc angle is 0, it can be considered a right angle. Then the shape of the orthographic projection of the first opening 210 on the substrate layer 100 can include an arc corner and a right angle, and can also include arc corners with different curvatures. The embodiments of the present application do not make specific limitations. The corner with a smaller curvature can increase the light-emitting area of the light-emitting device, and the corner with a larger curvature is easier to implement in terms of process.

[0075] In some embodiments, the fan angle range corresponding to the arc length of the first arc angle is 8° to 15°, and the fan angle range corresponding to the arc length of the second arc angle is 0° to 3°. The larger the fan angle, the longer the corresponding arc length. The arc lengths of the first arc angle and the second arc angle can be set according to the specific chromaticity scheme.

[0076] Exemplarily, Figure 3 is a top view of a partial structure of a display panel provided by an embodiment of the present application. As Figure 3As shown, the light-emitting device 300 may include a first light-emitting device 310, a second light-emitting device 320, and a third light-emitting device 330, and the first light-emitting device 310, the second light-emitting device 320, and the third light-emitting device 330 emit light of different colors. The area of the orthographic projection of the first opening 210 corresponding to the first light-emitting device 310 on the substrate layer 100 is larger than the area of the orthographic projection of the first opening 210 corresponding to the second light-emitting device 320 on the substrate layer 100, and the area of the orthographic projection of the first opening 210 corresponding to the first light-emitting device 310 on the substrate layer 100 is larger than the area of the orthographic projection of the first opening 210 corresponding to the third light-emitting device 330 on the substrate layer 100. One first light-emitting device 310, one second light-emitting device 320, and two third light-emitting devices 330 may be grouped into a pixel unit, which is a repeating unit of the display panel and is used to mix and emit colored light to achieve color picture display. The orthographic projection of the first opening 210 corresponding to the first light-emitting device 310 on the substrate layer includes a first arc angle A and a second arc angle B. The edges of the second openings 410 corresponding to the first light-emitting device 310, the second light-emitting device 320, and the third light-emitting device 330 on the orthographic projection on the substrate layer 100 are the first opening edge 411, the second opening edge 412, and the third opening edge 413, respectively.

[0077] Exemplarily, as Figure 3 shown, the first light-emitting device 310 may emit blue light, the second light-emitting device 320 may emit red light, and the third light-emitting device 330 may emit green light, forming the three primary colors for color mixing to obtain color.

[0078] In some embodiments, the edge of the orthographic projection of the first opening 210 corresponding to the light-emitting device 300 on the substrate layer 100 is parallel to the edge of the orthographic projection of the second opening 410 on the substrate layer 100. The distance at which the light emitted by the light-emitting device 300 hits the inner wall of the second opening 410 is uniform, which can achieve a uniform light condensing effect on the light emitted by the light-emitting device 300 and improve the chromaticity uniformity of a single light-emitting device.

[0079] Exemplarily, referring to Figure 3 , the first opening edge 411 is parallel to the edge of the orthographic projection of the first opening 210 corresponding to the first light-emitting device 310 on the substrate layer 100, the second opening edge 412 is parallel to the edge of the orthographic projection of the first opening 210 corresponding to the second light-emitting device 320 on the substrate layer 100, and the third opening edge 413 is parallel to the edge of the orthographic projection of the first opening 210 corresponding to the third light-emitting device 330 on the substrate layer 100.

[0080] In some embodiments, the distance between the orthographic projection of the second opening 410 on the substrate layer 100 and the orthographic projection of the first opening 210 on the substrate layer 100 is less than 5 μm. It can be understood that the projection edge of the second opening 410 is within the range of ±5 μm of the projection edge of the first opening 210.

[0081] In some embodiments, the distances between the edges of the orthographic projections of the first openings 210 corresponding to the light-emitting devices 300 emitting different color lights and the edges of the orthographic projections of the second openings 410 on the substrate layer 100 are different. Exemplarily, Figure 4 is a top view of a partial structure of another display panel provided by an embodiment of the present application. As Figure 4 shown, the distance between the first light-emitting device 310 and the edge 411 of the first opening is the smallest, followed by the distance between the second light-emitting device 320 and the edge 412 of the second opening being in the middle, and the distance between the third light-emitting device 330 and the edge 413 of the third opening being the largest. The greater the distance between the projection edge of the first opening and the projection edge of the second opening, the longer the optical path of the light, then more light can enter the inner wall of the second opening, more light can be gathered, and the area of the light-emitting device is small and the amount of light generated is small. By setting the distance from the second opening edge, the light output after gathering can be increased.

[0082] In some embodiments, the orthographic projection of the first opening 210 on the substrate layer 100 falls within the orthographic projection of the second opening 410 on the substrate layer 100. Exemplarily, referring to Figure 3 and Figure 4 , the projection of the second opening 410 surrounds the projection of the first opening of the corresponding light-emitting device 300, and the opening area of the second opening 410 is larger than the opening area of the corresponding light-emitting device 300. Then all the obliquely emitted light rays emitted by the light-emitting device 300 can enter the material cross-section formed by the second opening, and the reflection occurs to the maximum extent to gather the light.

[0083] Exemplarily, Figure 5 is a schematic cross-sectional view along C-C of a top view of a partial structure of a display panel provided by an embodiment of the present application. As Figure 5 shown, the display panel further includes a driving device. The driving device includes a semiconductor layer 601, a gate 602, a source 603, a drain 604, and a first insulating layer 605. The light-emitting device includes an anode 301, a light-emitting layer 302, and a cathode 303. The anode 301 is electrically connected to the source 603 through a via hole in the second insulating layer 700. A packaging layer 800 is provided between the cathode 303 and the first refractive index layer 400. The packaging layer 800 can protect the light-emitting layer 302 from being eroded by water and oxygen in the external environment. Figure 5The effective light-emitting region of the light-emitting device is indicated by the dashed box in the figure. The light-emitting region is mainly restricted by the boundary of the light-emitting layer 302. The second opening region of the first refractive index layer 400 is larger than the effective light-emitting area of the light-emitting device, and the second opening surrounds the light-emitting device.

[0084] In some embodiments, the orthographic projection of the first opening 210 on the substrate layer 100 and the orthographic projection of the second opening on the substrate layer are misaligned and overlapped. The misaligned overlap is mainly adjusted according to the need of the light concentration ratio. When the shape of the light-emitting device is asymmetric, the shape of the second opening can be set to be symmetric, which will cause the projection of the first opening corresponding to the light-emitting device to be misaligned with the projection of the second opening, and the light concentration effect can be balanced, and the uniformity of the light concentration effect can be improved. The embodiments of the present application do not make specific limitations. The symmetry of the shape of the second opening can make the light focusing degree on both sides of the light-emitting device consistent and can improve color deviation.

[0085] In some embodiments, when the shape edge of the orthographic projection of the first opening 210 corresponding to the light-emitting device 300 on the substrate layer 100 includes a first arc angle A and three second arc angles B, the shape edge of the orthographic projection of the second opening 410 on the substrate layer includes at least two first arc angles A; the first arc angle A corresponding to the light-emitting device 300 is parallel to any first arc angle A corresponding to the second opening 410, that is, the position of the first arc angle A of the light-emitting device 300 corresponds to the position of a first arc angle A of the second opening 410, and any two first arc angles corresponding to the second opening 410 are relatively arranged, that is, any two first arc angles A of the second opening 410 can be symmetrically arranged. It should be noted that the number of the first arc angles A of the second opening 410 can also be 3 or 4, and the embodiments of the present application do not make specific limitations.

[0086] Exemplarily, Figure 6 It is a partial structure top view of another display panel provided by the embodiment of the present application. Figure 7 It is a schematic top view of the positional relationship between a light-emitting device and a second opening provided by the embodiment of the present application. Combining Figure 6 and Figure 7 , the first light-emitting device 310 is provided with a first arc angle A, and the rest are second arc angles B; the projection edge of the second opening is provided with two first arc angles A, and the rest are second arc angles B. Although the four corners of the first light-emitting device 310 are asymmetric, the setting of the two first arc angles A of the second opening can make the four corners of the second opening symmetric in pairs, and a symmetric light concentration effect on the first light-emitting device can be achieved, the light concentration effect can be balanced, and the uniformity of the light concentration effect can be improved.

[0087] Exemplarily, Figure 8 It is a schematic cross-sectional view along D-E of a partial structure top view of another display panel provided by the embodiment of the present application. AsFigure 8 As shown, the edge of a first arcuate angle of the second opening falls inside the projection edge of the first light-emitting device, and the distance between the two edges is b1. The distance between the edge of the other first arcuate angle of the second opening and the edge of the first arcuate angle of the light-emitting device is b2. The present application embodiment does not specifically limit the magnitude relationship between b1 and b2.

[0088] In some embodiments, the edge of the second opening 410 may include a convex portion, the edge of the second opening 410 may include a concave portion, and the edge of the second opening 410 may include a convex portion and a concave portion. The arrangement of the convex portion and the concave portion can increase the inner wall surface area of the second opening 410, can increase the area of the reflecting surface, can reflect more light, and achieve a better light condensing effect.

[0089] In some embodiments, the edge of the second opening 410 corresponding to the straight edge of the positive projection of the first opening 210 corresponding to the light-emitting device 300 on the substrate layer 100 includes at least one convex arc; the edge of the second opening 410 corresponding to the straight edge of the positive projection of the first opening 210 corresponding to the light-emitting device 300 on the substrate layer 100 includes at least one concave arc; the edge of the second opening 410 corresponding to the straight edge of the positive projection of the first opening 210 corresponding to the light-emitting device 300 on the substrate layer 100 includes at least one convex arc and at least one concave arc. The convex arc may correspond to the projection of the convex portion, and the concave arc may correspond to the projection of the concave portion. Generally, the light-emitting area of the light-emitting device corresponding to the straight edge of the projection of the first opening 210 of the light-emitting device 300 is relatively large, and more light is emitted. Therefore, by providing convex portions and concave portions on the second opening corresponding to the straight edge, the amount of reflected light can be further increased.

[0090] Exemplarily, Figure 9 is a top view of a partial structure of another display panel provided by an embodiment of the present application. As Figure 9 shown, the edge of the second opening corresponding to the straight edge of the positive projection of the first opening 210 where the light-emitting device is located on the substrate layer includes a concave arc 401.

[0091] Exemplarily, Figure 10 is a top view of a partial structure of a display panel provided by an embodiment of the present application. As Figure 10 shown, the edge of the second opening corresponding to the straight edge of the positive projection of the first opening 210 where the light-emitting device is located on the substrate layer includes a convex arc 402.

[0092] Exemplarily, Figure 11 is a top view of a partial structure of another display panel provided by an embodiment of the present application. As Figure 11As shown, the edge of the second opening corresponding to the straight edge of the orthographic projection of the first opening where the second light-emitting device 320 is located on the substrate layer includes a concave arc 401; the edges of the second openings corresponding to the straight edges of the orthographic projections of the first openings corresponding to the first light-emitting device 310 and the third light-emitting device 330 on the substrate layer include convex arcs 402.

[0093] In some other embodiments, a concave portion may be provided at the edge of the second opening corresponding to the first light-emitting device, and a convex portion may be provided at the edge of the second opening corresponding to the second light-emitting device. It is mainly necessary to consider the chromaticity scheme of the display panel and make targeted adjustments to the areas of the reflecting surfaces corresponding to different light-emitting devices so as to obtain a display panel with the required coordinates. In addition, the number of the convex portions and the concave portions may be set according to the chromaticity scheme, and the embodiments of the present application do not make specific limitations.

[0094] It should be noted that the above-mentioned convex and concave are relative. Under different reference objects, the convex and concave can be exchanged, which is only illustrative.

[0095] In some embodiments, when the shape edge of the orthographic projection of the first opening corresponding to the light-emitting device 300 on the substrate layer 100 includes a first arc angle A and a second arc angle B, the first arc angle A corresponds to at least one convex arc and / or at least one concave arc. Since the curvature of the first arc angle A is relatively large, the concave portion and the convex portion can be provided on the inner wall corresponding to the first arc angle to increase the omnidirectional reflection area of the light of the light-emitting device.

[0096] In some embodiments, the edge of the orthographic projection of the second opening 410 corresponding to the same light-emitting device 300 on the substrate layer 100 includes a convex arc or a concave arc. It can be understood that only convex portions or concave portions are provided at the second opening 410 corresponding to one light-emitting device 300, which is convenient for process preparation and reduces the process difficulty.

[0097] In some embodiments, the radius range of the convex arc 402 is 0.5 μm to 2 μm, and specifically, it can also be 1 μm - 2 μm. The radius range of the concave arc 401 is 0.5 μm to 2 μm, and specifically, it can also be 1 μm - 2 μm. Specifically, it can be set according to the need of the reflection area.

[0098] Exemplarily, Figure 12 is a top view of a partial structure of another display panel provided by the embodiments of the present application. As Figure 12As shown, the orthographic projections of the first opening 210 where the first light-emitting device 310 and the second light-emitting device 320 are located on the substrate layer are both rectangles, and the corresponding first opening edge 411 and second opening edge 412 are both rectangles. The edge of the orthographic projection of the first opening where the third light-emitting device 330 is located on the substrate layer includes a first arc angle, and the other three corners are right angles. The corresponding third opening edge 413 includes two first arc angles and two right angles. Figure 12 The shapes and arrangements of the light-emitting devices shown are merely illustrative and are not specific limitations of the embodiments of the present application.

[0099] In some embodiments, the display panel provided by the embodiments of the present application further includes a packaging layer, and the packaging layer can be disposed between the pixel defining structure and the first refractive index layer to protect the light-emitting device.

[0100] In some embodiments, the display panel may further include a touch control layer, the touch control layer can implement a touch control function, the touch control layer can be disposed between the packaging layer and the first refractive index layer, and the touch control layer can also be disposed on the side of the second refractive index layer away from the substrate layer. The position of the touch control layer can be set according to the settings of the factory production process or the interference factors of the film stack. In addition, the influence of the distance factor of the light emitted by the light-emitting device reaching the interface between the first refractive index layer and the second refractive index layer on the light condensing effect also needs to be considered to set the position of the touch control layer.

[0101] In some embodiments, the display panel may further include a color filter layer, the color filter layer can be disposed between the packaging layer and the first refractive index layer, and the color filter layer can also be disposed on the side of the second refractive index layer away from the substrate layer. The color filter layer can improve the color deviation of the display panel, and the setting of the position can refer to the consideration factors of the touch control layer.

[0102] Exemplarily, Figure 13 is a top view of a partial structure of another display panel provided by the embodiments of the present application. As Figure 13 shown, the touch control electrodes TC of the touch control layer are arranged around the light-emitting devices and do not affect the light emission of the light-emitting devices. Each light-emitting device can correspond to a color filter layer. The color filter layer can be a color filter film. The orthographic projection of the first opening where the light-emitting device is located on the substrate layer falls within the orthographic projection of the corresponding color filter film on the substrate layer. Exemplarily, when the first light-emitting device 310 emits blue light, the first light-emitting device 310 can be disposed corresponding to the blue color filter film 910, and the orthographic projection of the first light-emitting device 310 on the substrate layer falls within the orthographic projection of the blue color filter film 910 on the substrate layer. If the second light-emitting device 320 emits red light, the second light-emitting device corresponds to the red color filter film 920. If the third light-emitting device 330 emits green light, the third light-emitting device corresponds to the green color filter film 930. Figure 13It is only illustrative, and the embodiments of the present application are not specifically limited. It should be noted that the boundary of the orthographic projection of the light-emitting device on the substrate layer can be understood as the boundary of the orthographic projection of the light-emitting layer on the substrate layer.

[0103] In some embodiments, the geometric center of the orthographic projection of the first opening on the substrate layer coincides with the geometric center of the orthographic projection of the second opening on the substrate layer. Then it can be understood that the centers of the first opening and the second opening coincide, and the shapes of the first opening and the second opening are correspondingly arranged, which is beneficial to the uniformity of light convergence.

[0104] In some embodiments, the first openings are arranged in an array in the row direction and the column direction. Corresponding to the pixel design of the display panel, the light-emitting devices can be arranged in an array in the row direction and the column direction, and the corresponding first openings are also arranged in an array in the row direction and the column direction. Then the edges of the orthographic projection of the corresponding first opening on the substrate layer are flush with the edges of the orthographic projection of the second opening on the substrate layer in the row direction. The edges of the orthographic projection of the first opening on the substrate layer are flush with the edges of the orthographic projection of the second opening on the substrate layer in the column direction. Flush can be understood as alignment. For example, the corresponding projection edges of the first opening and the second opening coincide or are equidistant. The embodiments of the present application are not specifically limited.

[0105] In some embodiments, some edges of the orthographic projection of the first opening on the substrate layer are parallel to some edges of the orthographic projection of the second opening on the substrate layer. Some sides of the first opening and the second opening can be parallel, and the remaining sides can be non-parallel. The embodiments of the present application are not specifically limited.

[0106] In the second aspect of the embodiments of the present application, a display device is provided. Figure 14 It is a schematic structural diagram of a display device provided by the embodiments of the present application. As Figure 14 shown, the display device includes: the display panel 1000 as described in the first aspect.

[0107] The display device provided by the embodiments of the present application may include a smart phone, a tablet computer, a notebook computer, a television, a wearable display device or other displays, etc.

[0108] The display device provided by the embodiment of the present application sets a first refractive index layer and a second refractive index layer through a display panel. The first refractive index layer is provided with a plurality of second openings, and the orthographic projection of the second openings on the substrate layer at least partially covers the orthographic projection of the first openings on the substrate layer; a second refractive index layer is arranged in the second openings, and the refractive index of the second refractive index layer is greater than that of the first refractive index layer. The second refractive index layer fills the second openings, and the second openings are arranged corresponding to the first openings. A light-emitting device is arranged in the first openings. The light emitted by the light-emitting device first enters the second refractive index layer. Since the refractive index of the second refractive index layer is greater than that of the first refractive index layer, when the light enters the first refractive index layer from the second refractive index layer, the condition of light entering from an optically denser medium to an optically thinner medium is satisfied. When the incident angle satisfies the total reflection critical angle, total reflection will occur at the interface between the first refractive index layer and the second refractive index layer. Then, the light emitted at an inclined angle generated by the light-emitting device can be converged and emitted from the display panel. The setting of the first refractive index layer and the second refractive index layer can play a role in condensing light, converging the light emitted at an inclined angle by the light-emitting device to be emitted at a front view angle or an angle approaching the front view angle, which can avoid the absorption or dissipation of the light at an inclined angle, improve the effective light output of the display panel, and improve the display brightness of the display panel. Then, under the driving condition of the same display brightness, the driving power consumption can be reduced, low-power driving can be realized, and the service life can be extended. The light-condensing effect of the light-emitting device can also play a role in improving the color deviation of the display panel, that is, the increase in the light output of the light emitted by each light-emitting device can improve the corresponding color purity and avoid the chromaticity shift caused by the light emitted at an inclined angle emerging directly above the light-emitting devices of other colors.

[0109] It should be noted that in the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0110] The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

[0111] Although the preferred embodiments of this specification have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of this specification.

[0112] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that, Comprising: Substrate layer; Pixel defining layer, disposed on one side of the substrate layer, the pixel defining layer is provided with a plurality of first openings, and a light-emitting device is disposed in the first openings; First refractive index layer, disposed on the side of the pixel defining layer away from the substrate layer, the first refractive index layer is provided with a plurality of second openings, and the orthographic projection of the second openings on the substrate layer at least partially covers the orthographic projection of the first openings on the substrate layer; A second refractive index layer is disposed in the second opening, and the refractive index of the second refractive index layer is greater than the refractive index of the first refractive index layer; The shape edge of the orthographic projection of the first opening on the substrate layer includes a first arc angle and a second arc angle, and the radius of curvature of the first arc angle is greater than the radius of curvature of the second arc angle; When the shape edge of the orthographic projection of the first opening on the substrate layer includes one first arc angle and three second arc angles, the shape edge of the orthographic projection of the second opening on the substrate layer includes at least two first arc angles; The first arc angle corresponding to the first opening is parallel to any one of the first arc angles corresponding to the second opening, and any two of the first arc angles corresponding to the second opening are oppositely disposed; The orthographic projection of the first opening on the substrate layer and the orthographic projection of the second opening on the substrate layer are misaligned and overlapped.

2. The display panel according to claim 1, wherein The included angle between the side wall of the second opening and the plane where the substrate layer is located is an acute angle; and / or, The refractive index of the first refractive index layer is less than 1.6, and the refractive index range of the second refractive index layer is 1.6 to 1.9; and / or, The thickness range of the first refractive index layer is 1.5 μm to 3 μm, and the thickness range of the second refractive index layer is 3 μm to 6 μm.

3. The display panel according to claim 1, wherein The areas of the orthographic projections of the first openings corresponding to the light-emitting devices emitting different color lights on the substrate layer are different.

4. The display panel according to claim 1, wherein The radius of curvature range of the first arc angle is 8 μm to 15 μm, and the radius of curvature range of the second arc angle is 0 to 3 μm; The sector angle range corresponding to the arc length of the first arc angle is 8° to 15°, and the sector angle range corresponding to the arc length of the second arc angle is 0° to 3°.

5. The display panel according to claim 4, wherein The light-emitting device includes a first light-emitting device, a second light-emitting device, and a third light-emitting device, and the first light-emitting device, the second light-emitting device, and the third light-emitting device emit lights of different colors; The area of the orthographic projection of the first opening corresponding to the first light-emitting device on the substrate layer is greater than the area of the orthographic projection of the first opening corresponding to the second light-emitting device on the substrate layer, and the area of the orthographic projection of the first opening corresponding to the first light-emitting device on the substrate layer is greater than the area of the orthographic projection of the first opening corresponding to the third light-emitting device on the substrate layer; The orthographic projection of the first opening corresponding to the first light-emitting device on the substrate layer includes the first arc angle and the second arc angle.

6. The display panel according to any one of claims 1-5, wherein The second refractive index layer covers the first refractive index layer and the second opening.

7. The display panel according to any one of claims 1-5, wherein The edge of the second opening includes a convex portion and / or a concave portion.

8. The display panel according to claim 7, wherein The edge of the orthographic projection of the second opening corresponding to the straight edge of the orthographic projection of the first opening on the substrate layer includes at least one convex circular arc and / or at least one concave circular arc; and / or, When the shape edge of the orthographic projection of the first opening on the substrate layer includes the first arc angle and the second arc angle, the first arc angle corresponds to at least one convex circular arc and / or at least one concave circular arc.

9. The display panel according to claim 8, wherein The edge of the orthographic projection of the second opening corresponding to the same light-emitting device on the substrate layer includes the convex circular arc or the concave circular arc.

10. The display panel according to claim 8, wherein The radius range of the convex circular arc is from 0.5 μm to 2 μm; and / or, The radius range of the concave circular arc is from 0.5 μm to 2 μm.

11. The display panel according to any one of claims 1-5, wherein The distance between the orthographic projection of the first opening on the substrate layer and the orthographic projection of the second opening on the substrate layer is less than 5 μm.

12. The display panel according to claim 11, wherein The edge of the orthographic projection of the first opening on the substrate layer is parallel to the edge of the orthographic projection of the second opening on the substrate layer.

13. The display panel according to claim 11, wherein The distances between the edges of the orthographic projections of the first openings corresponding to the light-emitting devices emitting different color lights on the substrate layer and the edges of the orthographic projections of the second openings on the substrate layer are different.

14. The display panel according to claim 11, wherein The geometric center of the orthographic projection of the first opening on the substrate layer coincides with the geometric center of the orthographic projection of the second opening on the substrate layer; and / or, The first openings are arranged in an array in the row direction and the column direction, and the edges of the orthographic projections of the first openings on the substrate layer are flush with the edges of the orthographic projections of the second openings on the substrate layer in the row direction; and / or, The first openings are arranged in an array in the row direction and the column direction, and the edges of the orthographic projections of the first openings on the substrate layer are flush with the edges of the orthographic projections of the second openings on the substrate layer in the column direction; and / or, Part of the edge of the orthographic projection of the first opening on the substrate layer is parallel to part of the edge of the orthographic projection of the second opening on the substrate layer.

15. The display panel according to claim 1, wherein Further comprising: An encapsulation layer disposed between the pixel defining layer and the first refractive index layer; A touch control layer, the touch control layer is disposed between the encapsulation layer and the first refractive index layer, or the touch control layer is disposed on a side of the second refractive index layer away from the substrate layer; and / or A light filtering layer, the light filtering layer is disposed between the encapsulation layer and the first refractive index layer, or the light filtering layer is disposed on a side of the second refractive index layer away from the substrate layer.

16. A display device, characterized in that, comprising: A display panel according to any one of claims 1-15.

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